161531344765102 has 192 divisors, whose sum is σ = 272242680652800. Its totient is φ = 71805896547840.

The previous prime is 161531344764961. The next prime is 161531344765127. The reversal of 161531344765102 is 201567443135161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 233764608577 + ... + 233764609267.

It is an arithmetic number, because the mean of its divisors is an integer number (1417930628400).

Almost surely, 2^{161531344765102} is an apocalyptic number.

161531344765102 is a deficient number, since it is larger than the sum of its proper divisors (110711335887698).

161531344765102 is a wasteful number, since it uses less digits than its factorization.

161531344765102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 161531344765102 in words is "one hundred sixty-one trillion, five hundred thirty-one billion, three hundred forty-four million, seven hundred sixty-five thousand, one hundred two".